IBKR will only accept opening orders for bonds which adhere to the Minimum Order Size as specified in the bond's prospectus, however, investors can sometimes acquire positions that are less than the Minimum Order Size – for instance, when an advisor opens a position that meets the Minimum and then allocates that execution to individual clients in portions which are below that.
When an account holds an open position that is less than the Minimum Order Size, they will generally be able to close that position by using the 'Close' button in the trading platforms.
Note
- The entire position would need to be closed in these instances, and that you cannot partially close a position which would result in an open amount that is less than the Minimum.